Hello Mojo, I am not a maker of this site, however I am an expert in the cellular field and would love to help you with your question.
The answer is more than likely Yes, it will still likely be relatively easy to acquire parts for your device. Looking back on a older device called the LG G2 (LG's Flagship model) parts are readily available and accessible. Particularly, most flagship phones by Apple, Samsung, LG, HTC, etc will have parts available due to third party manufacturers. No one can tell the future, however it is very likely.